Hydrogen atom

What is the lowest energy that an electron can have in a hydrogen atom? A. 0 B. + 1.634 x 10 to the power of -18 J C. + 2.179 x 10 to the power of -18 J D. -5.488 x 10 to the power of -19 J E. - 2.179 x 10 to the power of - 18 J

Metals and Water

Which of the following metals would be the least safe to drop in water? Why? A. lithium B. magnesium C. iron D. potassium E. aluminum

Paramagnetic

What elements are paramagnetic in the second row of the periodic table?

Solubility

The Ksp for Fe(OH)3 is 4 x 10-38. What is the maximum concentration of Fe+3 in neutral (pH=7) water? The solubility of NaCl is 35.7 grams per 100mL at 20°C. What is the Ksp for NaCl?

Reaction

The following is best described by which type of reaction? HCl + NaOH --> NaCl = H2O A. decomposition B. acid-base neutralization C. single displacement D.redox E. double displacement (metathetical)